Vulnerability · Published Nov 3, 2026 · Assigned by VulnCheck

CVE-2026-121397FreeRDP before 3.32.2 Heap Over-Read via WinPR save_png_to_buffer()

Medium 4.3

In plain English

A medium-severity out-of-bounds read in FreeRDP from FreeRDP. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.3% (higher than 19% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)4.3Medium

Exploit odds (30 days)0.3%top 80.7% of all CVEs

Exploited in the wildNo reportsCISA SSVC: poc

Attack toolingNoneno public tooling known

Official description

FreeRDP before 3.32.2 contains a heap buffer over-read vulnerability in save_png_to_buffer() that allows malicious RDP servers to leak client memory by sending 16 bpp DIB clipboard data. Attackers can offer a CF_DIB BI_BITFIELDS image that, when converted to PNG for a local application, embeds client heap bytes into the clipboard image.

Affected packages & fixed versions

Ecosystem	Package	Fixed in	Advisory
Debian:12	freerdp2	no fix listed	DEBIAN-CVE-2026-121397
Debian:13	freerdp3	no fix listed	DEBIAN-CVE-2026-121397
Debian:14	freerdp3	3.32.2+dfsg-1	DEBIAN-CVE-2026-121397
Ubuntu:22.04:LTS	freerdp2	no fix listed	UBUNTU-CVE-2026-121397
Ubuntu:24.04:LTS	freerdp3	no fix listed	UBUNTU-CVE-2026-121397
Ubuntu:26.04:LTS	freerdp3	no fix listed	UBUNTU-CVE-2026-121397
Ubuntu:26.10	freerdp3	no fix listed	UBUNTU-CVE-2026-121397

Affected products (as reported)

Vendor	Product	Versions
FreeRDP	FreeRDP	0 – before 3.32.2

Weakness: CWE-125 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N

References

GitHub Security Advisory (GHSA-x7w3-32ch-x2jq) vendor-advisory
VulnCheck Advisory: FreeRDP before 3.32.2 Heap Over-Read via WinPR save_png_to_buffer() third-party-advisory